CN100505942C

CN100505942C - Method and apparatus for handoff of a wireless packet data services connection

Info

Publication number: CN100505942C
Application number: CNB2003801027660A
Authority: CN
Inventors: R·礼萨伊佛
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2002-11-04
Filing date: 2003-11-03
Publication date: 2009-06-24
Anticipated expiration: 2023-11-03
Also published as: AU2003287496A1; WO2004043108A2; WO2004043108A3; JP4638236B2; CA2504806A1; JP4903901B2; JP2006506005A; KR101026342B1; US7085251B2; JP2011139479A; JP4903855B2; CN1711792A; AU2003287496B2; KR20050059331A; US20040085931A1; JP2010114917A

Abstract

Methods and apparatus for providing location information to an Access Terminal (AT) when the Access Network (AN) is unable to contact a last serving PDSN, else maintaining the previous location information. In one embodiment, AN elements within an area supported by a Packet Data Serving Node (PDSN) are given a same Access Network ID (ANID). In this way, movement of the AT within the area supported by the PDSN do not initiate an update of location information. The AT receives location information specific to the PDSN and not the AN.

Description

The method and apparatus that is used for the switching of wireless packet data service connection

Background technology

Invention field

The present invention relates to radio communication.More particularly, the present invention relates in wireless packet data service operations process, between wireless access network, carry out a kind of new method and the device of the seamless switching of travelling carriage with different radio interface.

Background technology

In order to satisfy the increased requirement to data communication in the wireless communication system, wireless network is designed to, and is connected with supporting Internet protocol (IP) grouping of network data network.Packet data serving node (PDSN) provides the interface between wireless network and IP network or other data network.Variety of protocol as " mobile IP ", has been stipulated mutual between wireless network and the PDSN.

When travelling carriage (MS) when the service area of a PDSN moves on to the service area of another PDSN, configuration information is updated, so that the home agent that is associated with MS (HA) can redirecting communications.Need a kind of effective method, be used for adapting to moving in the communication system.

Summary of the invention

Target of the present invention has provided a kind of method that is used for High Rate Packet Data communication system Access Network AN, comprise: Access Network AN receives the message of identification and the source Access Network AN that is associated of accessing terminal, and described source AN is associated with the first packet data serving node PDSN; Access Network AN responds described message and attempts to get in touch a described PDSN; Access Network AN be if can not get in touch a described PDSN, and one that then sets up with the 2nd PDSN is connected; One that sets up with described the 2nd PDSN with response is connected, and Access Network AN transmits the Access Network ID ANID that is used for described the 2nd PDSN to accessing terminal, and wherein said ANID is with described the 2nd PDSN of globally unique mode correspondence.

The present invention also provides a kind of method of carrying out the switching that accesses terminal in the High Rate Packet Data communication system, comprise: Access Network AN is that data communication detects the variation of the packet data serving node PDSN of service from a PDSN to the two PDSN, the corresponding described PDSN of the first global unique Access Network ID ANID wherein, and corresponding described the 2nd PDSN of second global unique Access Network ID ANID; Access Network AN response detects described variation, is that positional information is upgraded in described data communication, and wherein said renewal comprises described second identifier sent to and accesses terminal; With when not detecting the variation of service PDSN, Access Network AN keeps described positional information.

The present invention also provides a kind of method that is used for High Rate Packet Data communication system access terminal AT, comprising: set up the data communication between an access terminal AT and the Access Network AN; Access terminal AT receives the positional information from Access Network AN, and this positional information is as the function of the packet data serving node PDSN of service; Upgrade described positional information with access terminal AT, wherein said positional information comprises global unique Access Network ID ANID of a described serving PDSN of correspondence.

The present invention also provides a kind of Access Network AN of runing of being configured in the High Rate Packet Data communication system, comprise: be used for Access Network AN and receive from the device of access terminal AT identification with the message of the source Access Network AN that is associated of accessing terminal, described source AN is associated with the first packet data serving node PDSN; Attempt to get in touch the device of a described PDSN; If can not get in touch a described PDSN, the device that connects with the 2nd PDSN then; Connect with response and described the 2nd PDSN, Access Network AN transmits to access terminal AT and is used for the device that described the 2nd PDSN transmits Access Network ID ANID, and wherein said ANID is with corresponding described the 2nd PDSN of globally unique mode.

The present invention also provides a kind of Access Network AN of runing of being configured in the High Rate Packet Data communication system, comprising: processor controls; Be connected to the access memory device of described processor controls; With the Access Network information updating unit, it is connected to described processor controls and access memory device, and the packet data serving node PDSN that is adapted at the service that detects is when changing to two PDSN relevant with second global unique Access Network ID ANID with the relevant PDSN of first global unique Access Network ID ANID, upgrade the positional information be associated with data communication, wherein upgrade the position packets of information and draw together and send described second global unique Access Network ID ANID to participation data communication access terminal.

The present invention also provides the access terminal AT in a kind of High Rate Packet Data communication system, comprising: processor controls; The access memory device, it is connected to described processor controls, and be suitable for stored position information, this positional information is Access Network ID ANID, this Access Network ID ANID is globally unique for the packet data serving node PDSN of service, the variation of wherein said location information response PDSN and being updated, and when not detecting when changing, can be left in the basket.

The present invention also provides a kind of method access terminal from the first Access Network AN that connects the first packet data serving node PDSN to the switching of the 2nd AN that connects the 2nd PDSN of carrying out in the High Rate Packet Data communication system, described method comprises: receive from described first message that accesses terminal at described the 2nd AN place, described first message comprises the global unique identification symbol of a described PDSN; Respond described first message, connect with described the 2nd PDSN; Respond described establishment of connection, send second message from described the 2nd AN to described accessing terminal, described second message comprises the global unique identification symbol of described the 2nd PDSN.

Description of drawings

In conjunction with the accompanying drawings, according to the detailed description of setting forth below, characteristics of the present invention, target and advantage will become apparent, in whole accompanying drawings, and the implication unanimity of identical Reference numeral, wherein:

Figure 1A is the chart that only utilizes the wireless system configuration of 1x wireless access network (RAN);

Figure 1B is the figure that the wireless system configuration of packet area identification is shown;

Fig. 1 C be one of signal support in the communication system of Internet protocol (IP) communication path flow to figure;

Fig. 1 D is the figure of the part of the wireless communication system shown in Figure 1B.

Fig. 2 describes the message flow graph that distributes an IP address according to mobile IP standard to MS2.

Fig. 3 is the figure that only utilizes the wireless system configuration of HDR wireless access network (RAN).

Fig. 4 is the figure that utilizes the wireless system configuration of 1x and HDR wireless access network (RAN).

Fig. 5 be expression when 1x RAN with can carry out when switching between the HDRRAN that international mobile station identificat (IMSI) verifies, by the flow chart of a process of MS use.

Fig. 6 is a message flow graph describing the renewal of the location parameter of access node in the wireless communication system.

Fig. 7 is the flow chart of the renewal of the location parameter at each PCF place in the expression wireless communication system.

Fig. 8 is the structure chart of access terminal (AT).

Fig. 9 is the structure chart of a travelling carriage (MS).

Figure 10 is the structure chart of an Access Network (AN) element.

Embodiment

The speech that uses among the application " example ", the meaning are " to be used as an example, example, or illustration." any embodiment of describing as one " embodiment of example " must not be considered to best, or be better than other embodiment described herein.

The use of code division multiple access (CDMA) modulation technique is to help to have a kind of in several technology of the communication of a large amount of system users.Other multiaddress communication system technology, as time division multiple access (TDMA), frequency division multiple access (FDMA) and such as the amplitude-modulation system of amplitude compandored SSB (ACSSB), by industry is known.These technology are by standardization, with the interactive operation between the equipment of realizing being made by different company.Code division multiple address communication system is standardized as TIA/EIA/IS-95-B by telecommunications industry association in the U.S., is entitled as " travelling carriage-base station compatibility standard that is used for dual mode wideband spread spectrum cellular system ", and is called as IS-95 here.In addition, a new standard that is used for cdma communication system is proposed by the telecommunications industry association (TIA) of the U.S., is entitled as " upper strata (layer 3) signaling standard that is used for the cdma2000 spread spectrum system, version A-appendix 1 ", date is labeled as in November, 2000, and is called as " 1x " here.Be used to provide an other standard of TIA high speed rate data, services, be entitled as " cdma2000 High Rate Packet Data air interface specification ", be called as " HDR " or " IS-856 " here.

Recently, International Telecommunications Union requires radio communication channel for ratification that the suggesting method of high data rate and high-quality speech business is provided.During these are proposed first issued by telecommunications industry association, is entitled as " IS-2000ITU-R RTT candidate proposal." these in proposing second are entitled as " the ETSIUMTS terrestrial wireless inserts (UTRA) ITU-R RTT candidate and proposes " by ETSI (ETSI) issue, also are known as " wideband CDMA ", are called as " W-CDMA " hereinafter.The 3rd proposal submitted to by U.S.TG 8/1, is entitled as " UWC-136 candidate proposal ", is called as " EDGE " hereinafter.The content of these proposals is disclosed records, for industry is known.

Originally IS-95 is optimized for the transmission of variable-rate voice frames.Standard afterwards all is based upon on this standard, to support various additional non-voice service, comprises packet data service.A cover packet data service like this is standardized as TIA/EIA/IS-707-A in the U.S. by telecommunications industry association, is entitled as the data, services of spread spectrum system " be used for select ", is incorporated herein by reference, and is called as " IS-707 " below.

IS-707 has described and has been used for to send the technology that the internet protocol datagram grouping provides support by the IS-95 wireless network.Utilization is known as an agreement of PPP(Point-to-Point Protocol), and these packets are encapsulated as a no tagged word throttling.Utilize PPP, the IP datagram that length can reach 1500 bytes can be transmitted by the section of wireless network with any size.Wireless network keeps ppp state information at the PPP session stage, maybe when the extra byte of growing is sent out with continuous byte stream between the PPP end points.

Be connected to remote network node such as the individual or the laptop computer (PC) of the radio mobile station that can use grouped data, can insert the Internet by wireless network according to the IS-707 standard.Run through describe below in employed term MS, access node (AN), travelling carriage (MN) and distant station, each all relates to a mobile participant in the radio communication.Selectively, remote network node such as web browser can be embedded among the MS, select for PC.MS can be any one in the equipment of many types, includes but not limited to PC card, personal digital assistant (PDA), external or internal modem or radio telephone or terminal.MS sends data by wireless network, and by packet data service node processes.Being used for MS remains in the PDSN usually with the ppp state that is connected between the wireless network.PDSN is connected to IP network, as the Internet, and wireless network and be connected to IP network other entity and agency between transmit data.Like this, MS can send data and receive data by another entity that wireless data connects on IP network.Target entity on the IP network also is known as communication node (correspondent node).

Before sending by IP network and receiving the IP packet, MS must obtain an IP address.In some early stage schemes, from an address pool that is specific to PDSN, distribute an IP address to MS.Each PDSN is connected to one and limits one or more wireless access networks (RAN) that the geographic area is associated.When MS shifted out by PDSN service regional, the data that send to MS by a PDSN can not arrive MS.If MS moves into the zone by the 2nd PDSN service, then must distribute a new IP address to MS from the address space of the 2nd PDSN.Based on old IP address with communication node just carrying out be connected and will be interrupted suddenly.

When moving from PDSN to PDSN, in order to prevent connection failure, MS uses an agreement that is known as mobile IP.The Internet engineering duty group (IETF) standardization the mobile IP among (RFC) 2002 that request for comments, be entitled as " support of IP mobility ", announce in October, 1996, and in the industry cycle know.The use of mobile IP is standardized as EIA/TIA/IS-835 in the cdma2000 network, is entitled as " Wireless IP network standard ", and the date is labeled as in June, 2000, is known as " IS-835 " here.In mobile IP, PDSN does not provide IP the address from himself address pool, but as a Foreign Agent, helps distribute the address from being arranged in IP network home agent somewhere.MS communicates from FA to HA, and receives an IP address of the address pool distribution that is subordinated to HA.When MS when a PDSN moves to the 2nd PDSN, MS communicates by the 2nd PDSN and FA, so that register its existing IP address again to HA.

IS-707 and IS-835 have described a park mode, and wherein the wireless link of setting up for the transmission grouped data is idle in the cycle at certain hour, and it can be reactivated by network, and need not interrupt related PPP session.When packet data streams restarted, wireless link was rebulid, and did not need repetition PPP configuration and negotiation.Therefore, compare, when wireless link is interrupted, preserve ppp state and can make MS and wireless network can restart to send grouped data more quickly with the situation that must rebulid ppp state.

The 1x standard of proposing provides the mechanism of upgrading the Route Selection between HA and many PDSN and the 1x RAN.Even when MS in park mode changes RAN, as long as MS does not move to the RAN that utilizes dissimilar wave points, HDR and 1x standard be update packet Route Selection effectively all.For example, if MS moves to HDR RAN from 1x RAN when dormancy, it is fuzzy or redundant Route Selection to occur, and packet may be lost.When various these systems are used, just need such mechanism, so that effectively more new data packet is to the Route Selection of MS, this MS moves utilizing between the RAN of dissimilar wave points.

Figure 1A describes only to utilize a kind of network configuration in the system of 1x Radio Access Network 32,34,36.In one embodiment, individual or laptop computer 4 are connected to wireless MS 2 by data connection 12.PC is connected 12 with data between the MS 2 can use physical cables, as Ethernet, and serial, or USB (USB) cable.Selectively, it can be wireless connections that data connect 12, connects or dedicated radio link as infrared or other optics, as bluetooth or IEEE 802.11 WLAN (wireless local area network).As discussed above, selectively, PC can combine with MS 2, to carry out network insertion by single equipment.In the drawings, MS 2 respectively with RAN 32, RAN 34 and RAN 36 (in Fig. 1 by mark make RAN A, RAN B, RAN C) change its physical location in the related overlay area 6,8,10.RAN 32 and RAN 34 are connected to PDSN 14, and PDSN 14 is connected to IP network 18.RAN36 is connected to PDSN 16, and PDSN 16 is connected to IP network 18 then.Home agent 20, checking, authorize and meter account (AAA) server 22, and communication node 24 also can insert by IP network 18.A plurality of additional PDSN, HA, aaa server, and communication node can be connected to IP network 18, but for simplicity and with its omission.

Initial be connected to RAN as MS2, for example during RAN 32, MS 2 must be from the IP address of a certain entity acquisition that is connected with IP network 18.As discussed above, in the scheme in early days, from an address pool that is assigned to PDSN14, distribute to IP address of MS2.PDSN 14 will send to PDSN 14 by IP network 18 because carry all packets of an IP address of that address pool, so can send to those packets corresponding MS 2 then.Yet if MS 2 shifts out the overlay area of any RAN that is connected to PDSN 14, PDSN 14 will no longer can forward packets to MS 2.For example, if MS 2 moves to the overlay area 10 of RAN 36 from the overlay area 6 of RAN 32, then MS 2 must obtain a new IP address from the address pool of PDSN 16.Any packet that sends to the old address that is associated with PDSN 14 must be dropped, and any network that utilizes old address that is just carrying out connects and can not be used.

In early mobile IP scenario, MS 2 obtains its IP address from the HA 20 that is connected to IP network 18.After the pond that is associated with HA 20 obtains an address, mobile IP protocol makes the MS 2 can be by among a plurality of

RAN

32,34 or 36 any one, or receives the packet of that IP address of carrying by in a plurality of

PDSN

14 or 16 any one.As substituting from one of HA 20 dynamic assignment IP addresses, MS 2 also can have an IP address in the address pool of HA 20, and this address pool is prepared in the internal memory of MS 2 in advance, for example when Service Activation.

Figure 1B represents the packet data network 100 according to an embodiment.Notice that alternate embodiment can be used different terms to the similar functions unit, can comprise the different configurations of parts and functional unit.In the discussion here, network 100 and other detailed figures among Figure 1B will be used to define a paths; Yet the embodiment that substitutes can be according to specific configuration and use therein functional definition one paths.Block data system 100 comprises two system banners (SID) zone 110,120, and each zone has a plurality of network identities (NID) zone 112,114,116,122,124,126.SID/NID is used for voice system, identifies a service area usually.For example, MSC service area can be with a pair of (SIN, NID) value be relevant.

For an intrasystem block data communication supporting block data communication, as the system among Figure 1B 100, mobile IP communication is described in " support of IP mobility " that bear the date of in October, 1996 by C.Perkins with connective, and this article is called as RFC2002.Fig. 1 C represents a given mobile node (MN) 260 or according to the information flow in the datagram of the travelling carriage (MS) of mobile IP.As shown in the figure, each mobile node 260 is to change the main frame or the router of its tie point from a network or sub-network to another.Mobile node can change the position and not change the IP address; When the link layer connectivity that has to tie point, utilize this IP address can continue to communicate by letter with other internet node in any position.Each mobile node 260 has a relevant home agent 252.Home agent 252 is routers on the home network of mobile node, and home agent 252 encapsulation of data newspaper when mobile node 260 leaves this locality (home) being transferred to mobile node 260, and is kept current position information for mobile node 260.Main frame 258 provides the data that can send mobile node 260 to.Mobile node 260 is also from FA 254 reception information.

Foreign Agent 254 is routers on the visited network of mobile node, after registration, can provide the Route Selection service to mobile node 260.254 pairs of datagrams by home agent 252 encapsulation of mobile node of Foreign Agent are sealed off, and datagram is delivered to mobile node 260.For the datagram that is sent by mobile node 260, Foreign Agent 254 can be used as a default router of the mobile node of registration.

Mobile node 260 is given a long-term IP address on home network.This home address is managed in the mode identical with the mode that offers " permanent " IP of fixed host computer address.When leaving home network, one " Care-of Address " is associated with mobile node 260, and the current tie point of reflection mobile node.Mobile node 260 utilizes the source address of home address as all IP datagram of its transmission.When leaving this locality (home), mobile node 260 is to home agent 252 transmitting register addresses.According to the method that connects, mobile node 260 can directly be registered to its home agent 252, or registers to its home agent 252 by a Foreign Agent 254, and this registration is delivered to home agent 252.

For the system among Figure 1B 100, the Typical Disposition 300 in each packet zone identifier (PZID) is indicated among Fig. 1 D.Packet data serving node (PDSN) 302 be coupled to Packet Control Function (PCF) node 304 and 310,304 and 310 each be connected to base station controller (BSC respectively _S) BSC ₁306 and BSC ₂312.First communication path is defined as PDSN302 to PCF ₁304 to BSC ₁306, BSC wherein ₁306 communicate by letter with MN308 in the PZID320 by an air interface.When mobile node (MN) 308 moves to another PZID, as PZID330, set up a new route for block data communication, it is defined as PDSN302 to PCF ₂310 to BSC ₂312, BSC wherein ₂312 communicate by letter with MN308 in the PZID320 by an air interface.From PDSN302 to PCF ₁304 and PCF ₂310 path connects definition A10 and connects.From PCF ₁304 to BSC ₁306 and from PCF ₂310 to BSC ₂312 path connects definition A8 and connects.Setting up a PPP between MN308 and PDSN302 connects.If MN changes PDSN, then between MN and new PDSN, set up a new PPP and connect.

For the calling of supporting Packet data service, exist the fixed network transfer of data with transmit by air interface data between the packet data serving node (PDSN) that is connected.PDSN is connected to BS by Packet Control Function (PCF) interface, this PCF BS co of can maybe can getting along well.For the block data system shown in Fig. 1 D, MN308 can operate under a kind of situation at least three kinds of states or pattern.

Fig. 2 is a message flow chart, and expression distributes an IP address according to mobile IP standard to MS2.At first, MS2 begins a wireless link to RAN, and wherein RAN is connected to PDSN14, and sends first message 202 by RAN to PDSN14.If MS2 has international mobile station identificat (IMSI), then MS2 sends this IMSI in first message 202.First message 202 can be several a kind of in dissimilar, and this depends on the type of the wave point that RAN supports or the connection status of the wireless link between MS2 and the RAN.For example, if MS2 is not connected to RAN, then first message 202 can be an originating information, if or MS2 communicate by letter with RAN by wireless link, then can be an Agent Solicitation.By the numbering of expression PDSN 14 in the example, first message 202 also can send by the RAN that is connected to another PDSN such as PDSN 16.

First message 202 is made response, and PDSN 14 is with message 204 responses, and message 204 comprises an agent broadcast message and a checking is addressed inquires to.The address of the Foreign Agent in the agent broadcast message sign PDSN 14.It is a part of shaking hands that checking is addressed inquires to, and prevents that other network entity from unexpectedly or mala fide utilizing network identity to intercept the packet of preparing into MS2.MS2 and checking, mandate and meter account server 22 utilize shared secret information to programme, and this secret information is unavailable in IP network 18.Shared secret information allows aaa server 22 to check the identity of MS2 before MS2 is allowed to transmit a request to HA20.If the authentication failed of aaa server 22, then MS2 can not ask an IP address from HA20.In one embodiment, the secret of Gong Xianging has been taked the form of username and password.

In case receive the inquiry from the message 204 that PDSN14 receives, MS2 utilizes its shared secret information to form a challenge response with challenge information, so that HA20 can check the identity of MS2.For example, MS2 utilizes one-way Hash function (hashing function) that shared secret information and challenge information are combined.MS2 sends message 206 and turns back to PDSN 14, and message 206 comprises challenge information, challenge response and registration request.PDSN 14 passes to aaa server 22 to three parts of information with message 208 then.Utilize identical one-way Hash function, the shared secret information that aaa server 22 can check MS2 to use is although shared secret information self never sends by network.Aaa server 22 can be one of several brands or type.In one embodiment, used remote authentication dial-in customer service (RADIUS) server.

If aaa server 22 determines that the challenge response from MS2 is effectively, aaa server 22 transmits registration request 210 to HA20.HA20 has an IP available address pool, and it can give mobile network's entity, as MS2 distributing IP address.Select give HA20 by IP network 18 through route from any IP packet of a destination-address of the address pool of HA20 by carrying of sending of IP network 18.Based on the content of registration request 210, HA20 forms a registration and answers 212, and it comprises an IP address as the source address in the packet that is sent to other network entity by MS2.HA20 sends the FA in the response 212 to PDSN 14.FA writes down the IP address, and it is associated with a RAN-PDSN (R-P) session, and sets up a RAN-PDSN (R-P) session.In one embodiment, FA with the R-P information stores in a table according to the index of IP address.For finishing the IP address assignment to MS2, PDSN 14 sends message 214 to MS2 by RAN.Message 214 comprises from the registration of HA20 answers, and comprises the IP address of distributing to MS2.

After had registered its IP address, MS2 can begin to send the IP packet by IP network 18.For example, MS2 can begin and corresponding node 24 communication, for example Web servers.The source address that the packet that MS2 sends is being carried the destination-address of respective nodes 24 and distributed to MS2.All message that MS2 sends are to select route by the FA among the PDSN 14.FA sends a dateout grouping can directly for IP network 18, or it is contained in the bigger packet submitting to HA20.If adopt a kind of method in back, HA20 separates packing to the packet that receives from PDSN 14, and the packet of separating packing is sent to its interior destination of corresponding node 24.

Response from corresponding node 24 will be carried the destination-address of being distributed to MS2 by the address pool that belongs to HA20.All such message are to select route by IP network 18 to HA20.HA20 checks the destination-address of the IP packet of each reception, with identification MS2 and relevant PDSN14.Then, HA20 is encapsulated in this packet in the bigger packet of the destination-address that carries PDSN14.Packed packet is received by the FA among the PDSN14.FA separates packing to this packet, finds the IP address, destination of separating the packing packet in its R-P table.FA sends this packet by the RAN relevant with corresponding R-P session then.Concerning MS2, mobile IP process is transparent, except owing to all packings, separates packing and transmission and some increase delays of generation.

In Figure 1A, MS2 is represented as the area of coverage 6 that is arranged in RAN 32.In Figure 1A, all RAN _S32, the wave point of 34,36 use 1x types.Use the 1x wave point network using IMSI discern travelling carriage.The MS2 that sets up new wireless link sends its IMSI in originating information.RAN is by verifying IMSI with attaching position register (HLR) (not marking) exchange inquiry and challenge response message.HLR is the part of signaling system 7 (SS7) wireless telephony network, the standardization of this system, and be familiar with by industry.The checking of IMSI is to finish by the technology of utilizing and the one-way Hash function technology is similar, describes in this relevant hereinbefore mobile IP checking.

In an embodiment shown in Figure 1A, MS2 at first sets up a connection by first 1x RAN32, is registered among the HA20 about the description of Fig. 2 as above-mentioned.After mobile IP registration was finished, MS2 was used to an address from the HA20 address pool, adopted the ppp state in the FA among the PDSN14 to send packet.In a 1x system, PDSN 14 is by its IMSI identification MS2.In the area of coverage 6 of RAN 32, the MS2 monitoring is from the Overhead Message (overhead message) of the base station broadcast among the RAN 32.These Overhead Messages are discerned the packet area I D (PZID) of RAN32 with the message of other type.

When MS2 leaves the area of coverage 6 of RAN 32, when entering into the area of coverage 8 of RAN 34, MS2 decodes to the Overhead Message of the base station broadcast of RAN 34.RAN 34 Overhead Messages comprise the PZID that is different from the base station broadcast among the RAN32.When MS2 detects variation among the PZID, its sends one " pseudo-starting point (fake origination) " to RAN34.In one embodiment, this originating information comprises the IMSI of MS2, a number that is ready for sending (DRS) territory reaches a PREV_PZID territory according to this.Because starting point mainly is for routing update, the DRS territory is set to 0, the grouped data that expression MS2 will not send.If MS2 has new grouped data will send to network by chance, it can utilize the originating information that has in the DRS territory one 1 to send normal a calling.The PREV_PZID territory comprises the PZID of the previous system that MS2 connects.RAN 34 receives originating information, and the IMSI of MS2 and PREV_PZID are sent to its serving PDSN, PDSN14.PDSN 14 determines that from IMSI MS2 has an existing ppp state in the PDSN 14, determines that from the PREV_PZID value MS2 is from RAN 32.Because PDSN14 is connected to original RAN 32 and destination RAN 34 simultaneously, PDSN14 generally can only point to destination RAN34 to same ppp state again.Owing to some reasons, if PDSN14 can not point to destination RAN 34 to same ppp state again, PDSN 14 resets its ppp state, forces MS2 to set up a new PPP session.

When MS2 leaves the area of coverage 8 of RAN 34, when entering into the area of coverage 10 of RAN36, MS2 decodes to the Overhead Message of the base station broadcast of RAN 36.RAN 36 Overhead Messages comprise the PZID that is different from the base station broadcast among the RAN 34.When MS detects variation among the PZID, its sends one " pseudo-starting point " to RAN 36, this message comprise MS2 IMSI, to have value be a DRS territory of 0 and a PREV_PZID territory identifying the PZID of previous RAN, RAN34.RAN36 receives originating information, and the IMSI of MS2 and PREV_PZID are sent to its serving PDSN, and PDSN 16.Whether before be connected to PDSN 16 according to MS2, PDSN 16 can have a ppp state relevant with the IMSI of MS2.No matter whether previous ppp state exists, PDSN 16 determines that from the PREV_PZID value MS2 comes from a RAN who is connected to different PDSN.Therefore PDSN 16 can not retrieve ppp state from different PDSN, a new PPP session will setting up with MS2.If PDSN 16 has a previous PPP session of setting up with MS2, this means that PDSN16 must abandon this PPP session.

Set up between MS2 and PDSN 16 after the new PPP session, PDSN 16 sends agent advertisement message to MS2, the address of the FA in the identification PDSN 16.Because the address of each FA is different, the FA address of PDSN 16 will be different from the FA address of PDSN 14.When MS2 receives when having agent broadcast message of different addresses, MS determines that it must set up new registration procedure its IP address to HA20.MS sets up new registration procedure its IP address to HA20, for example can register according to the agreement in the above-mentioned associated description among Fig. 2.Utilize above-mentioned mobile IP checking, HA20 finds that MS2 has moved and asked identical IP address.As possible, HA20 distributes identical IP address to give MS2, and the destination is redirected to PDSN16 for the message of this address.Usually, HA20 does not give original PDSN, and PDSN 14 sends the notice that redirects.

Fig. 3 represents only to adopt the network configuration in HDR RAN42,44,46 the system.MS2 is arranged in the area of coverage 6 of RAN 42 at first.In Fig. 3, all RAN42,44,46 utilize a kind of wave point of HDR type.Utilize the HDR wave point network using unicast access terminal identifier symbol (UATIs) discern travelling carriage.

HDR RAN does not generally obtain IMSI from MS2, but distributes IMSI can for each MS2, mainly is to allow the R-P session with PDSN is identified.By providing some IMSI to support, the HDR network can use the PDSN of the same type that the 1x system adopted.In general, strict HDR network is not carried out any IMSI checking, and is not connected with the SS7 wireless telephony network.As shown, IP network 18 is communicated by letter with aaa server 22, PDSN14,16, HA20 and communication node 24.

MS2 is connected with a HDR system as RAN 42 by first HDR RAN, obtains UATI from RAN42.RAN42 distributes an interim IMSI to MS2 then, so that grouped data can be carried out Route Selection by the FA among the PDSN 14.Selectively, if RAN 42 can verify IMSI, RAN 42 distributes the IMSI of MS2 reality in the R-P link process of foundation and PDSN14.If RAN 42 can verify IMSI, it can utilize the authentication center on the SS7 network or utilize aaa server 22 to do like this.MS2 registers to HA20 then, as mentioned in the description of relevant Fig. 2.After mobile IP registration was finished, the MS2 utilization utilized the transmission of the ppp state in FA packet among the PDSN 14 by the IP address that HA20 distributes to it.In the area of coverage 6 of RAN 42, the Overhead Message of the base station broadcast of MS2 monitoring RAN 42.In one embodiment, this Overhead Message comprises such information, that is, make MS2 determine when that MS2 is arranged in the relevant area of coverage 6 in base station of RAN 42.Allow the Overhead Message of the MS2 identification RAN relevant to be called as subnet mask with area of coverage.When MS2 leaves an area of coverage, when entering into another district, the subnet mask that receives on the overhead channel will change accordingly.

When MS2 leaves the area of coverage 6 of RAN 42, when entering into the area of coverage 8 of RAN 44, MS2 decodes to the Overhead Message of the base station broadcast among the RAN 44.When MS2 detected the variation of subnet mask, it sent a UATI updating message to RAN 44.This UATI updating message comprises the UATI that is distributed to MS2 by RAN 42.RAN 44 determines that UATI is distributed by other RAN, and is connected to other HDR RAN of consolidated network for the UATI inquiry.As mentioned above, the database of UATIs, ppp state information, IMSIs and out of Memory is to distribute among the HDR RAN in wireless network.Based on the UATI of original distribution, RAN 42 obtains the form data relevant with MS2.Because RAN 42 and RAN 44 are connected to PDSN 14 simultaneously, RAN44 determines the interim IMSI relevant with the UATI of MS2, and notice PDSN 14 MS2 relevant with this IMSI moved to RAN 44.

When MS2 leaves the area of coverage 8 of RAN 44, when entering into the area of coverage 10 of RAN 46, MS2 decodes to the Overhead Message of the base station broadcast among the RAN 46.RAN 46 Overhead Messages comprise the subnet mask that is different from the base station broadcast among the RAN44.When MS2 detected the variation of subnet mask, it sent a UATI updating message to RAN 46, and this message comprises the UATI of original distribution of MS2.RAN 46 receives the UATI updating message, and inquiry is connected to other RAN of PDSN 16, to determine whether MS2 receives its UATI near RAN and distribute.Because MS2 receives its UATI at the RAN 44 that is connected to PDSN 14 to distribute, RAN 46 can not point to self to ppp state again.Therefore RAN46 distributes a new UATI to MS2, forces MS2 to set up a new PPP session.Therefore MS2 will lose the state information relevant with the PPP session of its original PDSN 14.

After setting up new PPP session between MS2 and the PDSN 16, PDSN 16 sends an agent advertisement message to MS2, the address of the FA in the identification PDSN 16.Because the address of each FA is different, the FA address of PDSN 16 will be different from the FA address of PDSN 14.When MS2 receives when having agent broadcast message of different addresses, MS determines that it must set up new registration procedure its IP address to HA20.MS sets up new registration procedure its IP address to HA20, for example carries out according to the relevant agreement of describing among Fig. 2.Utilize above-mentioned mobile IP checking, HA20 finds that MS2 is mobile, and is asking identical IP address.As possible, HA20 distributes identical IP address to MS2, then the message of destination for this address is redirected to PDSN 16.Usually, HA20 does not give original PDSN, and PDSN 14 sends the notice that redirects.

Fig. 4 represents to have adopted

HDR RAN

_S52,56 and 1x RAN _SNetwork configuration in the system of 54 mixtures.MS2 is positioned at the area of coverage 6 of RAN 52 at first.The MS2 that design is operated under HDR that mixes and 1x system has the characteristics of these two systems.For example, it has the IMSI that is stored in memory, connects the HDR network but can utilize UATI to programme.

If HDR is

RAN

_S52,56 can carry out the checking of IMSIs, then link with the R-P of PDSN14 and 16 and can utilize the IMSI of MS2 reality to be established.By HDRRAN, utilize authentication center or aaa server 22 on the SS7 network, can finish the IMSI checking.In one embodiment, when the HDR session negotiation began, MS2 sent its IMSI to HDR RAN.The R-P that each HDRRAN52,56 can utilize the real IMSI of MS2 to set up with PDSN14 and 16 links.Because identical IMSI is used for 1xRAN54 and HDR RAN simultaneously _S52,56, PDSN can easily solve the ambiguity of any Route Selection, avoids submitting to the Route Selection of mistake of any packet of MS2.In addition, if original 1xRAN and destination HDRRAN share a single PDSN, for example be similar to the configuration among RAN 52, RAN 54 and the PDSN 14, this PDSN can reselect route to the R-P connection to destination RAN, utilizes existing P PP state again.

But, if HDR is

RAN

_S52 and 56 can not verify IMSI, and they will be created interim IMSI and be used for and PDSN _S14 and 16 R-P link.Switching from 1xRAN to HDR RAN subsequently for example from RAN 54 to RAN 52, can cause the Route Selection problem in the PDSN (as PDSN 14) that shares.In one embodiment, create a plurality of have identical ip addresses but the caused Route Selection problem of R-P session of different IMSI be by to PDSN operation carry out little modification and handle.

In one embodiment, MS2 is connected to the RAN of HDR system 52, and obtains a UATI from RAN 52.RAN 52 distributes an interim IMSI to MS2 then, so that the FA among the PDSN 14 carries out Route Selection to grouped data.MS2 is then as registering to HA20 described in Fig. 2.After mobile IP registration was finished, MS2 utilized HA20 to distribute to its IP address, utilized the ppp state among the FA of PDSN14 to send packet.In the area of coverage 6 of RAN 52, the Overhead Message of the base station broadcast of MS2 monitoring RAN 52.

When MS2 leaves the area of coverage 6 of RAN 52, when entering the area of coverage 8 of RAN 54, MS2 is to RAN _BThe Overhead Message of the base station broadcast in 54 is decoded.As mentioned above, the 1xRAN as RAN 54 broadcasts a PZID on its overhead channel.Like this, MS2 receives a subnet mask from RAN 52, receives a PZID from RAN 54.From the different Overhead Messages that RAN 54 receives, MS2 determines that it has moved in the network coverage with dissimilar wave points, as hereinafter explaining, MS2 and PDSN 14 must adopt special early warning, is that the packet of MS2 is because the ambiguity of Route Selection and being lost to prevent the destination.

Be the variation of response to network, MS2 sends to " the pseudo-starting point " that 54 1 of RAN comprise the actual IMSI of MS2.As a result, RAN 54 is connected with one of PDSN 14 new R-P based on the actual IMSI foundation of MS2.If PDSN 14 is previous not based on the IMSI foundation of reality and the ppp state of MS2, then PDSN 14 consults a new ppp state with MS2.Set up between MS2 and PDSN 14 after the new PPP session, PDSN 14 sends to agent advertisement message of MS2, the address of pointing out the FA among the PDSN 14.Because PDSN does not change, the FA address that in agent advertisement message, sends will with receive from RAN 52 identical.As a result, MS2 can not set up new registration procedure its IP address to HA20.Because MS2 obtains its IP address by RAN 52 from HA20, RAN 52 distributes an interim IMSI to MS2.The IP address that MS2 uses is linked to the interim IMSI of the FA among the PDSN14.The IP address is being carried in the all-network packet that arrives the FA among the PDSN 14, is routed to RAN 52, unless MS2 sets up new registration procedure its IP address to HA20.

In one embodiment, in case MS2 moves to the area of coverage of 1xRAN54 from HDR RAN52,56 the area of coverage, MS2 carries out setting up new registration procedure of mobile IP.For example, if MS2 enters into the area of coverage 8 of RAN 54 from the area of coverage 6 of RAN 52, MS2 sets up new registration procedure its address to HA20, even the FA address that receives in agent advertisement message is with directly employed in front address is identical.

Unfortunately, to the ambiguity that can not solve Route Selection fully of setting up new registration procedure of HA20.When MS2 first by RAN 52 when HA20 obtains its IP address, the Foreign Agent among the PDSN 14 is related with the combination of the IP address of interim IMSI and use the R-P session.Enter the area of coverage of RAN54 at MS2 after, MS2 sets up new registration procedure to HA20, and is assigned to identical IP address usually.Unfortunately, set up new registration procedure the actual IMSI that has utilized MS2, rather than the interim IMSI of initial RAN 52 distribution.As a result, the PDSN14 with identical ip addresses of distributing to two different R-P sessions will finish, and each such session is corresponding to different IMSI.When packet when the IP network 18 of carrying this IP address arrives, PDSN14 can not carry out Route Selection to the packet to RAN clearly.

In one embodiment, can revise PDSNs in the hybrid network to prevent such ambiguity.When an IMSI was given in FA distributing IP address, FA deleted any other input with identical ip addresses from its form, and no matter the value of IMSI.In the FA of PDSN, only allow each IP address to have only a R-P session.

Except MS moves into from the HDR system the situation of 1x system, must take special early warning to avoid entering from the 1x system ambiguity of the Route Selection of HDR system as MS.When MS2 passes through HDR RAN,, move to 1xRAN then as RAN 54 as RAN 56, this is by different PDSN services, set up new registration procedure its IP address to HA20 in the time of in RAN 54, turn back to RAN 56 again then and set up one when connecting, problem may especially severe.In the HDR of current proposition standard, it is just returned from a system that utilizes the different radio interface or has set up new registration procedure its IP address in other systems to have no idea to make MS2 notice RAN 56.When 1xRAN enters into 1xRAN, this is not a problem, because the PREV_PZID in pseudo-originating information allows PDSN to determine that MS2 sets up new registration procedure by different PDSN.This neither problem when entering into another HDR RAN from HDR RAN, because the UATI in the UATI request allows destination PDSN to determine whether MS2 sets up new registration procedure by different PDSN.

When MS when 1xRAN 54 reenters the area of coverage 10 of HDR RAN 56, MS2 sends a UATI request, comprises original UATI that MS2 uses in the area of coverage 10 of HDR RAN 56.MS2 utilizes the agreement of current proposition, has no idea to notify HDR RAN 56 its setting up new registration procedure in the 1x system that gets involved.As a result, RAN 56 will utilize existing P PP recovering state network service among the PDSN 16 relevant with the original UATI that uses of MS2.

In one embodiment, MS2 always resets its UATI after entering into HDR RAN from 1xRAN.When the UATI that resets is sent out in UATI request, HDRRAN will distribute to new UATI of MS2, thereby force and carry out setting up new registration procedure of mobile IP.Mobile IP sets up new registration procedure and can cause MS2 to be assigned to its original identical IP address of using usually.After finishing mobile IP and setting up new registration procedure, HA20 correctly direct network packets to HDR RAN, and to MS2.In an alternate embodiment, when MS when 1xRAN enters into HDR RAN, MS2 finishes identical thing basically by a PPP is reset.

In another embodiment, change the HDR standard and start to " position informing " message of HDR RAN to allow MS2.In existing HDR standard, position informing message can comprise the PZID that system identifier (SID), network identifier (NID) and MS set up new registration procedure the previous system of its IP address.Rely on this information, HDR RAN can inquire about its PDSN, thereby may change to the R-P session of HDRRAN.Otherwise if PZID belongs to the related 1xRAN with different PDSN, PDSN can reset the PPP session, thereby triggers the IP address and set up new registration procedure.

In another embodiment, MS2 sends mobile IP " proxy requests " message to the FA among the PDSN of destination.Based on the FA address that obtains from response, MS2 can set up new registration procedure its IP address to HA20, does not set up the new necessary bandwidth of PPP session and do not take.

Fig. 5 is a flow chart, and expression is when 1xRAN employed process of MS2 with can carry out between the HDR RAN that IMSI verifies switching the time.After the variation that detects the RAN type, MS2 sends to its IMSI of destination RAN in step 502.If destination RAN is 1xRAN, IMSI can send in the originating information that is used for " pseudo-starting point ".If destination RAN is HDRRAN, IMSI can send in configuration messages when consulting a new HDR session.

Do not have the R-P session relevant with the IMSI of MS2 if be connected to the PDSN of destination RAN, PDSN will set up the new PPP session with MS2.In step 504, MS2 determines whether set up with the new PPP session of PDSN.The foundation of the new PPP session of PDSN can mean that PDSN does not have the existing ppp state relevant with the IMSI of MS2.Selectively, the foundation of the new PPP session of PDSN can mean that PDSN can not be transformed into destination RAN from the R-P session of previous RAN with an existing P PP state.In either case, PDSN sends an agent advertisement message to MS2 usually, points out the address of the FA in the PDSN.If provide original RAN of service to be connected to identical PDSN to MS2, then it may not need to set up new registration procedure mobile IP to HA20.HA20 will pass to correct PDSN to packet.Yet if provide original RAN of service to be connected to different PDSN to MS2, MS2 should set up new registration procedure mobile IP, with the new PDSN address of notice HA20.Because whether MS2 can not determine new ppp state is essential to the variation of PDSN, MS2 sets up new registration procedure it in step 506 to HA20 and moves the IP address.

In step 504, if MS2 determines not set up new PPP session with PDSN, then whether MS2 sets up new registration procedure at the definite mobile IP of step 508 and takes place with original RAN type.As mentioned above, the agreement of different radio interface use is to be designed to manage MS2 moving in the different RAN of same type.Thereby, when among the RAN of MS2 at same type when mobile, the ambiguity of Route Selection can not take place.When in 1xRAN when mobile, MS2 sends the information of relevant original RAN, as PZID, determines whether to set up new PPP session to allow destination RAN.When MS2 was mobile in HDR RAN, the UATI of destination RAN by relatively receiving from the UATI updating message of MS2 need to determine whether new PPP session.

If original RAN is connected to different PDSN with destination RAN, the HA20 of MS2 in previous system sets up new registration procedure it and moves the IP address, and HA20 will still send the PDSN that original RAN is arrived in the packet of submitting to MS2 subsequently.For preventing such Route Selection ambiguity, if carrying out mobile IP in original RAN type, MS2 sets up new registration procedure, it sets up new registration procedure its IP address in step 506.

Supporting the IS-856 standard, and be designated TIA/EIA/IS-856-1, date is labeled as in the wireless communication system of title for the interim standard (being called " HRPD standard " here) of " cdma2000 High Rate Packet Data air interface specification " in January, 2002, the network equipment that provides data to be communicated with between Access Network is defined in packet switched data network (being typically the internet) and accesses terminal.Access Network approximately is equal to the base station.Access terminal and be defined as the user is provided the equipment of data connection.Accessing terminal can be to be connected to computing equipment, and as the laptop personal computer, perhaps it can be self-contained data equipment, as personal digital assistant.Access terminal and approximately be equal to travelling carriage.

AT communicates by letter with AN by wireless link according to radio link protocol (RLP).The message of protocol definition position refresh routine and mobile management is upgraded in the position.Location parameter is described the current configuration be convenient to the communication path of communicating by letter with AT among the AN.Location parameter comprises triplet information, as by＜SID, NID, PACKET_ZONE_ID〉given.AN can send location assignment message to AT, to upgrade positional information.In addition, AN can send a location request message with from AT inquiring position information.AT sends " position informing " message to respond or to send independently this message to making from the request of AN.Position informing message comprises a positional value (LV).LV comprises the territory shown in the table 1.Notice that position informing message is one type the positional value corresponding to the ANID among the 1x.For example, the LV among the HDR does not have subdomain, but a numbering.

The subdomain of table 1 positional value

LV is a numbering of giving travelling carriage by network delivery, is made by network to be used for determining whether travelling carriage has set up the PPP session with another PPP.LV also is called as Access Network ID (ANID).The LV of travelling carriage report is made by PCF and is used for being written into the PANID territory in A11-registration request.CANID is the territory that is offered PDSN by PCF (not being travelling carriage).

When AT moves to a zone, be to finish and new communication path can not connect serving PDSN the time wherein by at least one different AN facility components to the communication of AT, AN sends location assignment message.In this case, AN setting LV is a numbering corresponding to serving PDSN, and wherein this numbering is exclusive in the whole world.AN is the releasing position parameter discontinuously; AN does not upgrade location parameter yet, at this moment causes a new communication path when AT moves, as crossing over the PCF border.Each wireless session that moves comprises the address of PDSN.Radio session information can exchange by the A13 interface between AN.Session information response message is to be prescribed among the TIA/EIA/IS-878 of " the interactive operation standard (IOS) of High Rate Packet Data (HRPD) Access Network interface " at exercise question.Like this, the radio session information of retrieving from session information response message points out whether there is new serving PDSN to AN.Renewal is to utilize the IP address that is included in the original serving PDSN in the session information response message to carry out.

When AN can not connect original service PDSN, start a new data session (as PPP).Fig. 6 provides a flow chart of the processing that is illustrated in PCF.As shown in the figure, in step 602, in the zone of AT target approach BSC/PCF.In step 604, AT sends source BSC/PCF, i.e. the identifier of original BSC/PCF.At decision diamond frame 606, target BS C/PCF, promptly new BSC/PCF attempt to retrieve the wireless session from source BSC/PCF.If can retrieve wireless session and target P CF can communicate by letter with serving PDSN (decision diamond 608), the PDSN610 of target BS C/PCF contact service so.Otherwise if target BS C/PCF can not retrieve wireless session, then BSC/PCF sets up new wireless session in step 612.Processing proceeds to step 614, from AT request ANID.If target BS C/PCF can find serving PDSN, handle proceeding to step 610.Otherwise in step 618 and 620, PCF determines new serving PDSN.In step 622, positional information is provided for AT then.

Fig. 7 represents a kind of situation, and wherein AT has set up a PPP session with serving PDSN.As shown in the figure, PDSNx704 comprises a PPP conversation element 702.BSC/PCF720 supports the HRPD standard, and in the service area of PDSNx704.System 700 further comprises PDSNy714, and it comprises PPP conversation element 716.BSC/PCF722 supports the HRPD standard, and in the service area of PDSNy714.PCF724 supports the system as 1x, and in the service area of PDSNy714.

When AT moved to position can not connecting serving PDSN y, AN sent a location assignment message and upgrades the LV of AT storage.When AT when the service area of PCF722 moves to the service area of PCF720, PCF722 sends a LV and equals the location assignment message of ANID_x to AT.Mobile node ID (MNID) is identified as IMSI_1, and the IP address of PDSN is given as x.y.z.t.When AT when the service area of PCF722 moves to the service area of PCF724, AT reports ANID_x to PCF724.In response, PCF724 report ANID_x is as the PANID to PDSNy714.PDSNy714 is the value of ANID and PANID relatively, when ANID and PANID do not match, sends a mobile IP agent broadcasting packet and starts LCP and dispose.

The last LV that receives from network when data session is set up in the general maintenance of AT.That is to say, if AT be tuned to the 1x frequency, for example, adjust back to the HRPD frequency then to the response of voice paging, wherein do not set up data session in the 1x system, then do not need to change LV.

Fig. 8 represents an AT750, and it has receiving circuit 752, radiating circuit 756, and processor controls 754 and access memory device 758, wherein the LV information stores is in access memory device 758.Each module of AT750 is by communication bus 760 communications.The LV information of storage is a function of serving PDSN, rather than the function of the PCF of service.In this mode, AT750 receives the Access Network information corresponding to serving PDSN.AT750 does not need to receive Access Network information for each variation of the PCF of service.

Fig. 9 represents a MS2 device.As mentioned above, MS2 can have to exterior terminal or equipment, as the data connection 12 of individual or kneetop computer (PC) 4.In such configuration, MS2 comprises a local interface 812, with necessity conversion that provides data to connect signal and numerical data.Local interface 812 can be various cable interface types, as Ethernet, and serial or USB.Selectively, local interface 812 can provide wireless connections, connect as infrared ray or other optics, or wireless connections, as bluetooth or IEEE802.11.

Except the connection to exterior PC 4, MS2 can be provided to the direct access of IP network 18.For example, MS2 can comprise the web browser application of utilizing the agreement as wireless application protocol (wap).In such comprising in the application, local interface 812 can adopt the form of user interface, as comprises keyboard, liquid crystal (LCD) display or touch-sensitive display (as common use at an input interface of handheld personal digital assistants equipment (PDA) etc.) or be suitable for any other input interface that the wireless packet data user uses.

In one embodiment, local interface 812 provides application data to processor controls 804.Processor controls 804 can be any miscellaneous equipment that general microprocessor, digital signal processor (DSP), programmable logic device, application-specific integrated circuit (ASIC) (ASIC) maybe can be carried out function described herein.Handset user input interface and hand-held display can comprise keyboard, a LCD input interface (as common use that class interface on PDA) or be applicable to any other input interface that the wireless packet data user uses.

In addition, processor controls 804 is configured to carry out the processing in conjunction with the MS2 that describes among Fig. 1-7, handles as request IP resource, management PPP session and other procotol relevant with various wave points.Processor controls 804 can be single processor, maybe can comprise a plurality of independent processors (as the microprocessor by local interface 812 management of user's interface functions) and the DSP of management Radio interface protocols.

MS2 comprises a memory 802, is used for various types of data and information that access control processor 804 operating process need.Memory 802 can be single equipment, maybe can comprise a plurality of equipment, for example comprises flash memory, static state or dynamic random access memory (RAM), maybe can wipe or the nonvolatile memory of the non-read-only memory of wiping (ROM).Whole memories 802 or its part may be incorporated in to be had in whole processor controls 804 or its a part of individual equipment.Memory 802 can comprise such information, as address and the mobile IP address of executable code, the IMSI of processor controls 804, the shared secret information that is used to register mobile IP address, HA20.In addition, config memory 802 is stored the temporary copy of the grouped data that is transferred to and receives from wireless network, and for providing packet data service required whole state variables.

In one embodiment, the data that send to wireless network were encoded, modulate and interweaved in modulator (MOD) 806 and be exaggerated and up-conversion in reflector (TMTR) 808 before being transmitted by multiplexer (DIP) 810 and antenna 814.The data of the wireless network that receives by antenna 814 are to carry out gain controlling and down-conversion in receiver (RCVR) 816, and in demodulator (DEMOD) 818, deinterleave, demodulation, this is to carry out before Be Controlled processor 804 is handled.Modulator (MOD) 806, reflector (TMTR) 808, receiver (RCVR) 816 and demodulator (DEMOD) 818 can utilize polytype wave point operation, as 1x and HDR.If necessary, MS2 comprises a plurality of modulators, reflector, receiver or demodulator, with polytype wave point, comprise that 1x, HDR, W-CDMA and EDGE are compatible mutually.

Figure 10 represents a PCF900, and it comprises receiving circuit 902, processor controls 904, radiating circuit 906, Access Network information updating unit 908, access memory device 912 and communication bus 910.Configuration Access Network information updating unit 908 comes the method 600 shown in the execution graph 7.When AT entered regional that PCF900 supports, Access Network information updating unit 908 received an indication.AT sends a unicast terminal usually and inserts identifier (UATI).AT provides an address, makes target BS C/PCF find a source BSC/PCF, and wherein with respect to the moving of AT, target is new BSC/PCF, i.e. BSC/PCF900, and source BSC/PCF is old BSC/PCF.BSC/PCF900 attempts to retrieve the wireless session from source BSC/PCF then.If PCF900 can retrieve wireless session, PCF900 then attempts to connect last service PDSN.As possible, get in touch with last service PDSN foundation.Otherwise set up new being connected with new PDSN, the ANID relevant with new PDSN offers AT.

Can not be as BSC/PCF900 from source BSC/PCF retrieval wireless session, BSC/PCF900 sets up new wireless connections, requires LV to AT.If BSC/PCF900 can not locate last serving PDSN, BSC/PCF900 determines new serving PDSN and sets up a connection.

It will be understood by those skilled in the art that and to utilize various technology and method to come expression information and signal.For example, the data of mentioning in the above-mentioned full content, instruction, order, information, signal, position, symbol and chip can be by voltage, electric current, electromagnetic wave, magnetic field or particles, optical domain or particle or and any combination represent.

Those skilled in the art it can also be appreciated that various illustrative logic diagrams, module, circuit and the algorithm steps described in conjunction with disclosed embodiment can electronic hardware, computer software or its make up and carry out.For clearly illustrating that the replaceability of hardware and software, various illustrative parts, block diagram, module, circuit and step are described in conjunction with its function hereinbefore.Such function is to carry out as hardware or as software, depends on the concrete application and the design limit of whole system.For each concrete application, but the function that professional person's accomplished in various ways is described, but these are carried out decision-making and should not be construed as and deviated from scope of the present invention.

In conjunction with disclosed embodiment, various illustrative logic diagrams described herein, module and circuit can utilize the gate array (FPGA) of general processor, digital signal processor, application-specific integrated circuit (ASIC), field-programmable or other programmable logical device, discrete door or transistor logic, discrete hardware component or other to design any combination of carrying out above-mentioned functions and carry out or implement.General processor can be a microprocessor, but under situation about substituting, processor can be any traditional processor, controller, microprocessor or state machine.Processor can also realize as the combination of computing equipment, the configuration as DSP and the combination of microprocessor, a plurality of microprocessor, the one or more microprocessors that combine with a DSP core or other are any.

The software module body that method step of describing in conjunction with embodiment disclosed herein or algorithm can be directly carried out with hardware, with processor realizes, or realizes with the two combination.Software module can reside in the storage medium of RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, removable dish, CD-ROM or any other form known in the art.Storage medium is connected to processor, makes processor to read and writing information from storage medium.Selectively, storage medium can with the processor one.Processor and storage medium can reside in ASIC.ASIC can reside in user terminal.Selectively, processor and storage medium can be present in the separated components of user terminal.

The explanation of disclosed embodiment more than is provided, and any technical staff in this area can make or use the present invention in view of the above.The various modifications of these embodiment are easy for those skilled in the art, and the basic principle of this paper definition can be used for other embodiment, and these embodiment do not deviate from the spirit or scope of the present invention.Thereby, the invention is not restricted to the embodiments described herein, and should be endowed and principle disclosed herein and features of novelty the broadest corresponding to scope.

Claims

1, a kind of method that is used for High Rate Packet Data communication system Access Network AN comprises:

Access Network AN receives the message of identification and the source Access Network AN that is associated of accessing terminal, and described source AN is associated with the first packet data serving node PDSN;

Access Network AN responds described message and attempts to get in touch a described PDSN;

Access Network AN be if can not get in touch a described PDSN, and one that then sets up with the 2nd PDSN is connected; With

One of setting up with described the 2nd PDSN of response is connected, and Access Network AN transmits the Access Network ID ANID that is used for described the 2nd PDSN to accessing terminal, and wherein said ANID is with described the 2nd PDSN of globally unique mode correspondence.

2, the method for claim 1 also comprises:

Setting up before with the 2nd PDSN one is connected, Access Network AN is from the described request position information that accesses terminal.

3, method as claimed in claim 2, wherein, described Access Network AN responds described message to be attempted to get in touch the step of a described PDSN and also comprises:

Attempt from described source AN retrieval wireless session.

4, the method for claim 1, wherein said reception message comprise that receiving unicast access terminal identifier accords with UATI message.

5, the method for claim 1, wherein said ANID identifies a plurality of Packet Control Function PCF nodes, and wherein each PCF node by described ANID sign is in the zone of being supported by described the 2nd PDSN.

6, a kind of method of carrying out the switching that accesses terminal in the High Rate Packet Data communication system comprises:

Access Network AN is that data communication detects the variation of the packet data serving node PDSN of service from a PDSN to the two PDSN, the corresponding described PDSN of the first global unique Access Network ID ANID wherein, and corresponding described the 2nd PDSN of second global unique Access Network ID ANID;

Access Network AN response detects described variation, is that positional information is upgraded in described data communication, and wherein said renewal comprises described second global unique Access Network ID ANID sent to and accesses terminal; With

When not detecting the variation of service PDSN, Access Network AN keeps described positional information.

7, a kind of method that is used for High Rate Packet Data communication system access terminal AT comprises:

Set up the data communication between an access terminal AT and the Access Network AN;

Access terminal AT receives the positional information from Access Network AN, and this positional information is as the function of the packet data serving node PDSN of service; With

Access terminal AT is upgraded described positional information, and wherein said positional information comprises global unique Access Network ID ANID of a described serving PDSN of correspondence.

8, be configured to the Access Network AN that in the High Rate Packet Data communication system, runs, comprise:

Be used for Access Network AN and receive from the device of access terminal AT identification with the message of the source Access Network AN that is associated of accessing terminal, described source AN is associated with the first packet data serving node PDSN;

Attempt to get in touch the device of a described PDSN;

If can not get in touch a described PDSN, the device that connects with the 2nd PDSN then; With

Response connects with described the 2nd PDSN, and Access Network AN transmits to access terminal AT and is used for the device that described the 2nd PDSN transmits Access Network ID ANID, and wherein said ANID is with corresponding described the 2nd PDSN of globally unique mode.

9, be configured to the Access Network AN that in the High Rate Packet Data communication system, runs, comprise:

Processor controls;

Be connected to the access memory device of described processor controls; With

The Access Network information updating unit, it is connected to described processor controls and access memory device, and the packet data serving node PDSN that is adapted at the service that detects is when changing to two PDSN relevant with second global unique Access Network IDANID with the relevant PDSN of first global unique Access Network ID ANID, upgrade the positional information be associated with data communication, wherein upgrade the position packets of information and draw together and send described second global unique Access Network ID ANID to participation data communication access terminal.

10, the access terminal AT in the High Rate Packet Data communication system comprises:

Processor controls;

The access memory device, it is connected to described processor controls, and is suitable for stored position information, and this positional information is Access Network ID ANID, and this Access Network ID ANID is globally unique for the packet data serving node PDSN of service,

The variation of wherein said location information response PDSN and being updated, and when not detecting when changing, can be left in the basket.

11, a kind of method access terminal from the first Access Network AN that connects the first packet data serving node PDSN to the switching of the 2nd AN that connects the 2nd PDSN of in the High Rate Packet Data communication system, carrying out, described method comprises:

Receive from described first message that accesses terminal at described the 2nd AN place, described first message comprises global unique Access Network ID ANID of a described PDSN;

Respond described first message, connect with described the 2nd PDSN;

Respond described establishment of connection, send second message from described the 2nd AN to described accessing terminal, described second message comprises global unique Access Network ID ANID of described the 2nd PDSN.

12, method as claimed in claim 11, wherein said the 2nd AN propagates global unique Access Network ID ANID of described the 2nd PDSN discontinuously.